Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod
The use of genetic markers under putative selection in population studies carries the potential for erroneous identification of populations and misassignment of individuals to population of origin. Selected markers are nevertheless attractive, especially in marine organisms that are characterized by...
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Online Access: | http://hdl.handle.net/11250/2584596 https://doi.org/10.1002/ece3.4648 |
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ftimr:oai:imr.brage.unit.no:11250/2584596 2023-05-15T15:27:18+02:00 Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod Jorde, Per Erik Synnes, Ann-Elin Espeland, Sigurd Heiberg Sodeland, Marte Knutsen, Halvor 2018 application/pdf http://hdl.handle.net/11250/2584596 https://doi.org/10.1002/ece3.4648 eng eng https://doi.org/10.5061/dryad.k718h66 Norges forskningsråd: 21610 Ecology and Evolution. 2018, 8 12547-12558. urn:issn:2045-7758 http://hdl.handle.net/11250/2584596 https://doi.org/10.1002/ece3.4648 cristin:1620282 12547-12558 8 Ecology and Evolution Journal article Peer reviewed 2018 ftimr https://doi.org/10.1002/ece3.4648 https://doi.org/10.5061/dryad.k718h66 2021-09-23T20:15:46Z The use of genetic markers under putative selection in population studies carries the potential for erroneous identification of populations and misassignment of individuals to population of origin. Selected markers are nevertheless attractive, especially in marine organisms that are characterized by weak population structure at neutral loci. Highly fecund species may tolerate the cost of strong selective mortality during early life stages, potentially leading to a shift in offspring genotypes away from the parental proportions. In Atlantic cod, recent genetic studies have uncovered different genotype clusters apparently representing phenotypically cryptic populations that coexist in coastal waters. Here, we tested if a high‐graded SNP panel specifically designed to classify individual cod to population of origin may be unreliable because of natural selection acting on the SNPs or their linked background. Temporal samples of cod were collected from two fjords, starting at the earliest life stage (pelagic eggs) and carried on until late autumn (bottom‐settled juveniles), covering the period during summer of high natural mortality. Despite the potential for selective mortality during the study period, we found no evidence for selection, as both cod types occurred throughout the season, already in the earliest egg samples, and there was no evidence for a shift during the season in the proportions of one or the other type. We conclude that high‐graded marker panels under putative natural selection represent a valid and useful tool for identifying biological population structure in this highly fecund species and presumably in others. publishedVersion Article in Journal/Newspaper atlantic cod Institute for Marine Research: Brage IMR Ecology and Evolution 8 24 12547 12558 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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language |
English |
description |
The use of genetic markers under putative selection in population studies carries the potential for erroneous identification of populations and misassignment of individuals to population of origin. Selected markers are nevertheless attractive, especially in marine organisms that are characterized by weak population structure at neutral loci. Highly fecund species may tolerate the cost of strong selective mortality during early life stages, potentially leading to a shift in offspring genotypes away from the parental proportions. In Atlantic cod, recent genetic studies have uncovered different genotype clusters apparently representing phenotypically cryptic populations that coexist in coastal waters. Here, we tested if a high‐graded SNP panel specifically designed to classify individual cod to population of origin may be unreliable because of natural selection acting on the SNPs or their linked background. Temporal samples of cod were collected from two fjords, starting at the earliest life stage (pelagic eggs) and carried on until late autumn (bottom‐settled juveniles), covering the period during summer of high natural mortality. Despite the potential for selective mortality during the study period, we found no evidence for selection, as both cod types occurred throughout the season, already in the earliest egg samples, and there was no evidence for a shift during the season in the proportions of one or the other type. We conclude that high‐graded marker panels under putative natural selection represent a valid and useful tool for identifying biological population structure in this highly fecund species and presumably in others. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Jorde, Per Erik Synnes, Ann-Elin Espeland, Sigurd Heiberg Sodeland, Marte Knutsen, Halvor |
spellingShingle |
Jorde, Per Erik Synnes, Ann-Elin Espeland, Sigurd Heiberg Sodeland, Marte Knutsen, Halvor Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod |
author_facet |
Jorde, Per Erik Synnes, Ann-Elin Espeland, Sigurd Heiberg Sodeland, Marte Knutsen, Halvor |
author_sort |
Jorde, Per Erik |
title |
Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod |
title_short |
Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod |
title_full |
Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod |
title_fullStr |
Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod |
title_full_unstemmed |
Can we rely on selected genetic markers for population identification? Evidence from coastal Atlantic cod |
title_sort |
can we rely on selected genetic markers for population identification? evidence from coastal atlantic cod |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2584596 https://doi.org/10.1002/ece3.4648 |
genre |
atlantic cod |
genre_facet |
atlantic cod |
op_source |
12547-12558 8 Ecology and Evolution |
op_relation |
https://doi.org/10.5061/dryad.k718h66 Norges forskningsråd: 21610 Ecology and Evolution. 2018, 8 12547-12558. urn:issn:2045-7758 http://hdl.handle.net/11250/2584596 https://doi.org/10.1002/ece3.4648 cristin:1620282 |
op_doi |
https://doi.org/10.1002/ece3.4648 https://doi.org/10.5061/dryad.k718h66 |
container_title |
Ecology and Evolution |
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8 |
container_issue |
24 |
container_start_page |
12547 |
op_container_end_page |
12558 |
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1766357754528661504 |